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T. SALISBURY.

LOOKED FASTENING FQR WATCH CHAINS.

Patented Juile 10, 1884.

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.' LOCKED FASTENING FOR WATCH- CHAINS @PECIFICATION forming part ofLetters Patent No. 300,135, dated June 10, 1884:. Application filedMarch 3. 1884. (No modehl To all whom it many concern/.-

Be it known that I, HENRY T. SALISBURY, of Pawtucket, in the county ofProvidence and State of Rhode Island, have invented a new and usefulImprovement in Locked Fastenings for Vat-ch Chains, 8: 0., of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings,forming a part of this specification.

My invention relates to devices for fastening the bar ends ofwatch-chains, &c., in the vest button-hole of the wearer; and the objectof my invention is to produce a strong fastening for the purpose whichcannot be detached exfcepting by certain predetermined manipulations ofits parts.

To these ends my invention consists in the peculiar and novelconstruction and arrangement of certain parts of the fastening, ashereinafter described and claimed.

In the accompanying drawings, Figure l is a front view of my improvedfastener. Fig. 2 is a side view of the same. Fig. 3 is a rear View ofthe same. Fig. 4 is a front view of the fastener with its faceplateremovedand with its internal parts in locked position. Fig. 5 is asimilar view showing the internal parts in the position which theyoccupy at the completion of the first of the'two unlocking movements.Fig. 6 is a similar view showing the position of the internal parts atthe completion of the two unlocking movements.- Fig. 7 is a transversesection of the fastener on the line 7 7 of Fig. 5.

The construction of the device is as follows:

A designates the body or casing of the fastener, and a a U-shaped hasplike that of a pad-lock, hinged at one end, and provided at its free endwith a notch, the free end being intended to enter an aperture in theedge or side of the case A. This hasp is at what may be termed the upperside of the case. At the lower side of the case is formed an attachment,at, by means of which the end of a chain may be joined, by riveting orany other means, to the casing. The front face of the casing is formedwith an annular portion, a, upon which are formed or secured a series ofalphabetical characters, shown in Fig. 1, as fromA to J, inclusive.

B designates the face-plate, which is rigidly secured to a spindle, b,in such a manner as to turn therewith, the said spindle passing entirelythrough the casing from front to back, and having upon one end a hingedfinger and thumb-piece, b, by means of which the spindle is turned. Theface-plate Bis also provided with an annular series of alphabeticalcharacters, from K to R, inclusive, and the purpose of these two sets ofletters will appear hereinafter. \Vhen not in use, the piece I) hangsdown against the rear side of the casing.

O designates a spring-plate of a fragment of a circle form, which isattached at one end to the inside of the edge of the casing and passesaround within the casing to a point beyoud the opening which receivesthe notched end of the hasp a. The spring is provided with an opening oraperture at such a'point that when the spring is pressed its aperturewill come into alignment with the aperture in the edge of the casing,thus admitting of the withdrawal of the hasp, but so that when thespring is not pressed the aperture of the spring will be more or lessout of alignment with the aperture of the casing, and thus lock thehasp. On its outer side the spring 0 is provided with a pushpin,- 0,which projects outward through the casing, while upon its inner side,just opposite the pin 0, is a broad flat projection, c,

lying transversely of the spring, the purpose of which will be presentlyexplained.

Within the casing are two disks, D E, the former being loosely mountedon the spindle b, and having on its rear side a curved springplate, d,while on its front side is formed a stud, d, and on its periphery aradial notch, d, to receive the projection c. The disk E is mountedfixedly on the spindle b, so as to turn with it, and on its rear sidethis disk is provided with a projection, 0, while on its periphery isformed a radial notch, 0, similar to the notch don the disk D. Thepurpose of this structure will be best understood from a description ofthe operation of the fastener.

The operation of the device is as follows: It is to be understood thatthis fastener is, in reality, a sort of combination-lock; and in orderto detach the fastener from the buttonhole it is necessary to bring bothnotches d ande in alignment one above the other, in such positionrelative to the projection c as to permit the latter to enter the saidnotches.

D, and also carry the disk D around with the.

- spindle b and disk E, till the notch d of the disk D comes oppositethe projection c of the spring 0. At the completion of this firstmovement the spindle b is turned from left to right till its notch 0comes into alignment with the notch d, and also with the projection 0.During this second movement the disk D is prevented from turning withthe disk E by the spring (2 acting upon the back of the casing A, sothat the spindle Z2 turns within the disk D, and the disk E rides overthe disk D.

The fastener may now be opened by pressing upon the push-pin c. Thefastener is locked by simply snapping the hasp into its opening and thenturning the spindle from left to right. The purpose of the two sets ofletters is simply to indicate the completion of each of the tworequisite. unlocking movements. For instance, the combination of thedevice shown is A 0 F, A and F being the fiXed characters, and O themovable. By first turning the spindle from right to left, the let ter 0is carried to the letter A, and that indicates that notch d is in linewith the projection 0. Then by reversing the movement of the spindletill the letter O is carried to the letter F, and then the position ofthe notch E over the notch d is indicated. Of course numerals,

figures, ciphercharacters, 850., may be used in lieu of the alphabeticalcharacters.

I do not propose to confine myself exclusively to the preciseconstruction shown and described; but,

Having thus described my invention, I claim 1. In a fasteningforwatch-chains, the combination,with a hasp and a lockingspring providedwith a sliding finger-piece, of a pair of notched rotating-disksarranged to hold the spring in locked position, excepting when turned toassume acertain relative position, substantially as described.

2. The combination, with the spring 0, provided with the projection c,of the disks D E, provided, respectively, with the notches d e, and alsowith the projections d c, substantially as set forth.

3. The spindle b, carrying the disk E, provided with the notch c and thestud e, in combination with the disk D, having the spring (1", notch (Z,and pin d, and the casing inclosing said parts, substantially asspecified.

4. The casing A, having the characters upon its front, in combinationwith the spindle b, carrying'the face-plate B and handle Z), the saidface plate having characters upon its front, substantially as described.

5. The casing A, provided with the hasp a, the spring 0, secured withinthe casing, and provided with the aperture, the projection c, andpush-pin c, in combination with the spindle I), having the handle I),the face-plate B, and the disk E, secured to said spindle, the disk D,and the notches,studs, and apertures, all constructed and arrangedsubstantially as set forth.

HENRY T. SALISBURY.

YVitnesses:

J. A. MILLER, Jr, M. E. BLTGH.

